chronometer
91Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… …
92Escapement — redirects here. For the fisheries term for the stock surviving fishing pressures over a spawning cycle, see Spawn (biology). For other uses, see Escapement (disambiguation). A deadbeat escapement, used in many pendulum clocks. Click above to see… …
93Balance wheel — in a cheap 1950s alarm clock, the Apollo, by Lux Mfg. Co. showing the balance spring (1) and regulator (2) …
94Lunar distance (navigation) — For the history of the lunar distance method, see History of longitude. Finding Greenwich time while at sea using a lunar distance. The Lunar Distance is the angle between the Moon and a star (or the Sun). The altitudes of the two bodies are used …
95Larcum Kendall — (21 September 1721 in Charlbury, Oxfordshire to 22 November 1795 in London) was a British Watchmaker. CommissionThe Board of Longitude asked Kendall to copy and develop John Harrison s ingenious fourth model of a useful clock (H4) for navigation… …
96Harrison, John — born March 1693, Foulby, Yorkshire, Eng. died March 24, 1776, London British horologist. The son of a carpenter, in 1735 he invented the first practical marine chronometer. He followed it with three later instruments, each smaller and more… …
97Omega Seamaster — The Omega Seamaster 300M Type Automatic/Quartz Display Analogue Introduced 1947 The Omega Seamaster is an automatic winding chronometer and …
98Watch — For other uses, see Watch (disambiguation). Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47 3352) A watch is a small timepiece, typically worn either on the wrist or attached on a chain and carried in …
99Dezimaluhr — Dieser Artikel beschäftigt sich mit der technischen Uhr im Allgemeinen; zu der speziellen Bedeutung von Uhren in der Informatik siehe Logische Uhr und Echtzeituhr. Schweizer Bahnhofsuhr mit Analoganzeige (Minutensprung und „schleichendem“… …
100John Harrison (Uhrmacher) — John Harrison John Harrison (* 24. März 1693, getauft 31. März 1693 in Foulby bei Wakefield, Yorkshire; † 24. März 1776 in London) war Tischler, Erfinder und autodidaktischer Uhrmacher. Er löste das so genannte …
